This author wrote a play in which Pierpont Mauler argues with a member of the Black Straw Hats about a meat packing plant. In another of his plays, the singer Arkadi Cheidze relates the rescue of Michael, the son of the Grand Duke of Grusinia, by the peasant woman Grusha. This author of Saint Joan of the Stockyards also penned a treatise in which he described the "alienation effect" as a foundational part of his concept of "epic theater". This author of The Caucasian Chalk Circle collaborated with Kurt Weill, on an reworking of a John Gay play 
This author wrote a play in which Pierpont Mauler argues with a member of the Black Straw Hats about a meat packing plant. In another of his plays, the singer Arkadi Cheidze relates the rescue of Michael, the son of the Grand Duke of Grusinia, by the peasant woman Grusha. This author of Saint Joan of the Stockyards also penned a treatise in which he described the "alienation effect" as a foundational part of his concept of "epic theater". This author of The Caucasian Chalk Circle collaborated with Kurt Weill, on an reworking of a John Gay play in which Polly Peachum's father tries to hang Mack the Knife for marrying his daughter. For 10 points, name the German playwright who wrote The Threepenny Opera
This author wrote a play in which Pierpont Mauler argues with a member of the Black Straw Hats about a meat packing plant.
Bertolt {Brecht} [or {Eugen} Berthold {Friedrich Brecht}]